william hawksworth



.i @with tant @eine @una LOUIs CHRISTOPH, or PARIS, FRANCE, WILLIAM IIAWKSWORTH, or GARTNESS, NORTH BRITAIN, AND eUsTAvUs PALMER IIARDINeeOF OIIISWIOK, ENGLAND.

IMPROVEMENT-IN APPARATUS TOR DRAWING IvIITALs.

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TO ALL WH'OM IT MAY CONCERN:

Be it known that we, LOUIS CHRISTOPH, of Paris, in the Empiie ot France, WILLIAM HAwIswoRTmof- Gartness, North Britain, steel' manufacturer, and GUsTAVUs PALMER HARDING, of Bohemia House, Ghiswick, in the lcounty of' Middlesex, England, have invented or discovered new and useful Improvements in the Machinery or Apparatus Employed in'Drawing Metalsff and we, the said LOUIS CHRISTOPH, WILLIAM HAWKS- WORTH, Vand GUSTAVUS PALMER HARDING, do hereby declare the nature of the said invention, and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement thereof; that is to say y Our said invention relates to a peculiarsystem or mode ot" drawing metals, whether of atubular, hollow,

' Qr solid section, and consists in a peculiar construction of and the application to that purpse ofhydraulic or hydrostatic presses, in'lieu` of the ordinary mechanical power heretofore adopt-erh, y

In carrying out this invention, we employ a hydrostatic or hydraulic cylinder and ram, the griper-bars being, by preference, secured to the end of -the rain, whilst the draw-plates or ,wordles are fitted into a suitable support or flange cast on the cylinder, but this `arrangement may bereversed.

` And in order that our said invention may be fully understood, we shall now proceed more particularly to describe thcrsame, and f'or that purpose we shall refer'to thefigurcs on the sheet Ot` drawings hereunto annexed, the same letters of reference indicating corresponding parts in both figures. I l

Figure 1 of our drawings represents a partial vertical section and elevation of one'form of hydrostatic apparatus, whereby a number ot' cylindrical tubes, of the same or different diameters, Amay be drawn simultaneously; and i y t Figure 2 is a horizontal section ot' the same, taken along the line 1-2 in iig. 1. v

This apparatus is actuated by hydrostatic pressure. It consists Of-a long hydrostatioor hydraulic cylinder, A, securely fixed to the brick-work B, and having within it a strong hollow cast-iron piston ou ra'm,r C, provided at its lower end with a double-cup leather packing, D, fitting accurately the bore of the cylinder.

The cylinder'A is terminated at its low-er extrinity by a strong cover, E, bolted thereon, and having a pipe, F, attached thereto, for the inlet of the water, whiclris pumped therein in the usual manner adopted for hydrostatic presses.

'The body ot' the ram is made in one picco, with a strongl and wide Vflange or collar, G, which is cast or otherwise formed or fitted thereon near its upper extremity, inwliich flange or collar is made a series of apertures for therreceptionA of the -ends of' the draw-rods H H, which nre rinly secured, by an-y suitable or well-known means, at' their lower extremities, to the tubes I I, tube-drawn, land are retained at their upper ends bythe strong nuts .l J, or otherwise, 4

Near the middle of the cylinder A', -or other convenient part, is formed a somewhat similar flangeor collar,

K, in which is made a series of holes, correspondingl in position to those in the flange G, in which apertures are fitted the draw-'plates or wordles L L.

To the fiange ot' the cylinder-cover E are secured, in any convenient manner, the lower ends ofthe several mandrels M M, by means oi`which, in combinationV with the draw-plates, tho tubes are drawn.

In working the apparatus, the piston or ram is'first lowered to the bottom of its stroke, when thesmaller end of the tube or tubes is secured to the rod or rods H H, in any Wellknown or suitable manner. The mandrels are then so adjusted that the enlargements or swellings will be .wit-hin the tubes and about the middle of the draw-plates or wordlcs The pump is now operated, when the ram will commence to rise, and will drapr with it the several draw-rods H, and the tubes attached thereto.

,By this means a steady and powerful tractive power is applied' to the tubes, which'will be alldrawn simultaneously through the drawplates.

The same arrangement is oi` course applicable to tubes of' various sections other than circular.`

In the arrangement shown the press is irertical, but, if preferred, it may be ixed in a. horizontal position, or at an angle to the-horizon. In some eases we use two cylinders at a distance apart, andtwo rams or plungexs, fixed or formed end to end, in -which case we prefer that the arrangementishould be horizontal, but that is not essential. v

Having now described and particularly Aascertained the nature of our said invention, and the man-ner in WhicliAt-he same is carried into effect, we would observe, in conclusion, that what we claim is l The combination of the hydraulic or hydrostatic press, the collars or flanges K Gtlereo', and drawingapparatus, substantially as hereinbefore described. I

' L. CHRISTOPH,

W. HAWKSWORTH,

lWitnesses for L. CHRISTOPH: l Gr. P. LLRDIlTGr.

J. R. JOHNSON, i

F. F. RANDOLPH. Witnesses for W. HAwKswonTH:

H. N. WHITELAW, of Glasgow.

ROBERT BURGESS, qf Glasgow. Witnesses to the signing by the above-named GUsTAvUs PALMER HARDING:

G. F. WARREN,

JOHN DEAN,

} Both ofNo. 17 Graechurch Street, z'n thetty of London.' 

